9965603 has 2 divisors, whose sum is σ = 9965604. Its totient is φ = 9965602.

The previous prime is 9965581. The next prime is 9965609. The reversal of 9965603 is 3065699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9965603 - 2¹⁰ = 9964579 is a prime.

It is not a weakly prime, because it can be changed into another prime (9965609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4982801 + 4982802.

It is an arithmetic number, because the mean of its divisors is an integer number (4982802).

Almost surely, 2^9965603 is an apocalyptic number.

9965603 is a deficient number, since it is larger than the sum of its proper divisors (1).

9965603 is an equidigital number, since it uses as much as digits as its factorization.

9965603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 9965603 is about 3156.8343320485. The cubic root of 9965603 is about 215.1961649354.

The spelling of 9965603 in words is "nine million, nine hundred sixty-five thousand, six hundred three".